Controlled release of biocide from silica microparticles in wood paint

Sørensen, G.; Nielsen, Anders; Pedersen, Morten Møller; Poulsen, Søren Erbs; Nissen, H.‐U.; Poulsen, Matt; Nygaard, S.D.

doi:10.1016/j.porgcoat.2010.03.009

Cited by 56 publications

(38 citation statements)

References 21 publications

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“…Inhibition zone in sample with ZnPT and other organic antifungal agents have been ascribed to the fact that this component leaches from the polymer to the ambient 5,38,39 . According to Coulthwaite et al 5 a zone of inhibition means that free molecules of the biocide are on the surface of the polymer and are released in sufficient quantities into the surrounding culture medium where the sensitive organisms are present.…”

Section: Resultsmentioning

confidence: 99%

Antimicrobial Performance of Thermoplastic Elastomers Containing Zinc Pyrithione and Silver Nanoparticles

et al. 2017

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The purpose of the present study was to evaluate the antimicrobial potential of styrene-ethylene/ butylene-styrene based thermoplastic elastomers (TPE) incorporated with zinc pyrithione (ZnPT) and silver nanoparticles (AgNano). Japan Industrial Standard was applied to evaluate the antimicrobial potential of incorporated TPE compounds against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). Antifungal action was evaluated against Aspergillus niger, Candida albicans and Cladosporium cladosporioides. Samples prepared with ZnPT eliminated 99.9% of the E. coli and 99.7 % of the S. aureus population, and presented an inhibition zone in the fungal assay. Samples prepared with AgNano eliminated 99.7% of the E. coli and 95.5 % of the S. aureus population. There was no inhibition zone in samples containing AgNano; however, these samples did not present fungal growth on their surfaces. TPE samples containing ZnPT showed biocidal activity against the microorganisms tested and can be used to develop antimicrobial products.

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Section: Resultsmentioning

confidence: 99%

Antimicrobial Performance of Thermoplastic Elastomers Containing Zinc Pyrithione and Silver Nanoparticles

et al. 2017

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“…4b to 4f). It is expected that these nanoclusters formed by small silica particles with high surface area may be useful as support for fertilizers, nutraceuticals, pharmacology, biocides and others [5,6,[9][10][11].…”

Section: Dispersed Precursor Colloidal Silicamentioning

confidence: 99%

“…Moreover, an increased scientific interest has recently evolved around silica nanostructures for multifunctional, nanometer-scale containers for controlled release of fertilizers [9], pesticides [10], and biocides [11].…”

Section: Introductionmentioning

confidence: 99%

Biogenic SiO2 in colloidal dispersions via ball milling and ultrasonication

2016

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“…7.7.5 Efficacy of slow release particles in paints on microbial accumulation in the presence of micro-and macroorganisms Encapsulation of thymol and carvacrol leads to controlled release efficiency against Escherichia coli, Staphylococcus aureus, Listeria innocua, Saccharomyces cerevisiae and Aspergillus niger (Guarda et al, 2011). Against fungus Cladosporium cladosporioides isothiazolinon loaded carriers in paint films retain more biocidal activity after leaching than those containing free biocides (Edge et al, 2001) The controlled release from paint films with 3-Iodo-2-propynyl-butylcarbamate (IPBC) encapsulated in microparticles as well as with IPBC in model solution has been tested and resulted in prolonged release of encapsulated biocide compared to IPBC in reference solution (Sørensen et al, 2010). Raft and yacht tests have shown that paints with acrylic resin and hydrogenated rosin binder, embedded with zinc pyrithione loaded silica aerogel nanospheres show extended water uptake and the coating shows similar efficacy compared to commercial paints (Wallström et al, 2011).…”

Section: Microbiological Methodsmentioning

confidence: 99%

“…Active components tend to leach in a moist environment. For anti-fouling purpose, biocides are encapsulated into various carriers: zinc-pyrithione in 2-10 nm silica aerogel particles (Wallström et al, 2011), 3-iodoprop-2-ynyl N-butylcarbamate in porous silica microspheres (Sørensen et al, 2010), silver nanoparticles in gelatinous microparticles (Szabó et al, 2011), medetomidine in poly(methyl methacrylate) microspheres (Nordstierna et al, 2010), medetomidine, seanine, Irgarol, tolylfluanid in poly(methylmethacrylate) (Mok, 2010) and in hydroxystyrene homo and copolymer microspheres (Ghosh, et al, 2003), 3-isothiazoline derivatives in acrylic microgels (Gold et al, 2003), in acrylate, gum arabic, formaldehyde-melamine resin microparticles (Baum et al, 2008) or adsorbed on the surface of carbon-, silica-and zeolite microparticles (Dai et al, 2004;Aldcroft et al, 2005). Anti-corrosive self-regeneration is realized by slow, mostly pH-triggered release of inhibitors from micro-or nanoreservoirs (Shchukin et al, 2007;Motornov et al, 2010).…”

Section: Core-shell Structuresmentioning

confidence: 99%

The use of nano-/microlayers, self-healing and slow-release coatings to prevent corrosion and biofouling

Telegdi

Szabó

Románszki

et al. 2014

Handbook of Smart Coatings for Materials Protection

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The mitigation of corrosion and biofouling is a challenge. Through application of chemicals and special techniques can slow these undesired processes, an effective resolution requires a multidisciplinary approach involving scientists, engineers, and metallurgists. In order to understand the importance of the use of nano-and microlayers as well as selfhealing coatings, the basic concepts of corrosion, corrosion mechanisms, corrosion inhibition and the microbiologically influenced corrosion will be summarised. The preparation, characterization and application of Langmuir-Blodgett and self assembled nanolayers in corrosive and microbial environment will be discussed. Preparation and characterization of microcapsules/ microspheres and their application in coatings will be demonstrated by a number of examples.Keywords: nano-and microcoating, self-healing, slow-release, anticorrosion, antifouling IntroductionCorrosion is a well-known problem all over the world. It consumes a significant part of the gross national product (GDP) of developed and developing countries. A number of authors have provided comprehensive introductions to corrosion mainly in aqueous and wet environments (Jones, 1991;Kaesche, 2003; McCafferety, 2010). Corrosion is the destructive result of the chemical/electrochemical reactions between metals and the environment. Corrosive reactions involve water in either liquid or condensed phases. Most corrosion reactions are electrochemical processes. These involve electron or charge transfer in aqueous solution which leads to metal dissolution (anodic reaction). Depending on the pH of the solution, either hydrogen or hydroxonium ions evolve, resulting in oxides, oxyhydroxides, hydroxides and salts formed on the metal surface (cathodic reaction). The electrochemical potential or electron activity affects the rate of corrosion reaction. To understand corrosion it is necessary to discuss briefly the types of corrosion and the reactions involved.Corrosion occurs in various forms.-Uniform corrosion: The metal surface must be compositionally uniform; the aggressive environment has the same access to all parts of the metal. This type of

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Controlled release of biocide from silica microparticles in wood paint

Cited by 56 publications

References 21 publications

Antimicrobial Performance of Thermoplastic Elastomers Containing Zinc Pyrithione and Silver Nanoparticles

Antimicrobial Performance of Thermoplastic Elastomers Containing Zinc Pyrithione and Silver Nanoparticles

Biogenic SiO2 in colloidal dispersions via ball milling and ultrasonication

The use of nano-/microlayers, self-healing and slow-release coatings to prevent corrosion and biofouling

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